Today on our 2013 Mazda 5 we're going to test fitting the Thule Sonic double XL rooftop cargo box with 22 cubic feet of storage space and metallic silver, it's part number TH636S. Now, we've got the Thule rapid roof rack system already installed in the Mazda so, we're going to begin our test fit by placing our cargo box directly up on to our load bars. We found this is the best time to get our… see more >